Which “Harry Potter” Witch Should You Dress Up As For Halloween? I GOT HERMIONE GRANGER!!!!! You’re as lionhearted and loyal as they come. You’re almost always the smartest person in the room, and like Hermione, you only use your gifts for good. Whether you grab a scarlet and gold scarf or class it up with a Hermione-inspired Yule Ball gown, you’ll be a smash hit this Halloween.